In skateboarding, a trick that involves jumping while kicking the skateboard in one simultaneous motion. the skateboard will then rotate on its longitudinal axis 360 degrees untill it's rotation is stopped or "caught" by the skateboarder who then lands the trick as gravity brings it all back down.

I kicked my skateboard, and it flipped around... It sure was a gnarly kickflip

A kickflip is a skateboarding trick. When a kickflip is performed, the skateboard rotates 360 degrees on the boards axis. Kickflips are one of the most frustrating tricks to learn, as a skateboarder often learns the trick after all the beginner stuff ( eg. ollie and pop shove it ). I would say kickflips are one of the most common tricks in skateboarding, as everyone who doesn't skate is wanting to see an example. Kickflips were invented by Rodney Mullen, but he called them "Magic Flips". Kickflips can be combined with other tricks to make more advanced tricks, look below for examples.